What I'll also say is that points 1 and 2 (being aware that things can exist on the internet for longer and travel further than you intend) are not the same as 'don't be controversial'. "Controversial" opinions can be important to say.
(There is a genocide happening in Gaza. No one should not be afraid to say so because people might object to hearing it.)
The guidelines are just a reminder that you should be willing to stand behind the things you post (because you don't know but you might be called to).